GB1424673A - Vacuum or thermo forming sheet material - Google Patents
Vacuum or thermo forming sheet materialInfo
- Publication number
- GB1424673A GB1424673A GB1973672A GB1973672A GB1424673A GB 1424673 A GB1424673 A GB 1424673A GB 1973672 A GB1973672 A GB 1973672A GB 1973672 A GB1973672 A GB 1973672A GB 1424673 A GB1424673 A GB 1424673A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tool
- vacuum
- sheet material
- forming sheet
- thermo forming
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0003—Discharging moulded articles from the mould
- B29C37/0014—Discharging moulded articles from the mould by flexibly or permanently deforming undercut portions of the articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/46—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles using fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/30—Moulds
- B29C51/34—Moulds for undercut articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
1424673 Sheet forming PRESSED STEEL FISHER Ltd 2 July 1973 [26 April 1972] 19736/72 Heading B5A A moulding 16 that has been formed over a forming tool 11, e.g. by vacuum, has an undercut portion (12), Fig. 1, not shown, and is extracted from the tool 11 by blowing air between the tool and the undercut portion to cause it to expand and clear the tool. The non- undercut portion of the moulding is retained on the tool by a hood 15.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1973672A GB1424673A (en) | 1972-04-26 | 1972-04-26 | Vacuum or thermo forming sheet material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1973672A GB1424673A (en) | 1972-04-26 | 1972-04-26 | Vacuum or thermo forming sheet material |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1424673A true GB1424673A (en) | 1976-02-11 |
Family
ID=10134345
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1973672A Expired GB1424673A (en) | 1972-04-26 | 1972-04-26 | Vacuum or thermo forming sheet material |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1424673A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2850759A1 (en) * | 1978-11-23 | 1980-06-04 | Fraunhofer Ges Forschung | Mfg. thermo-formed PVC or polystyrene trays e.g. for eggs - by vacuum deep drawing plastics sheet or film over array to be packaged |
GB2187132A (en) * | 1986-02-27 | 1987-09-03 | Caravell Manufacturing Limited | Method and apparatus for moulding plastic sheet |
-
1972
- 1972-04-26 GB GB1973672A patent/GB1424673A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2850759A1 (en) * | 1978-11-23 | 1980-06-04 | Fraunhofer Ges Forschung | Mfg. thermo-formed PVC or polystyrene trays e.g. for eggs - by vacuum deep drawing plastics sheet or film over array to be packaged |
GB2187132A (en) * | 1986-02-27 | 1987-09-03 | Caravell Manufacturing Limited | Method and apparatus for moulding plastic sheet |
GB2187132B (en) * | 1986-02-27 | 1989-11-08 | Caravell Manufacturing Limited | Method and apparatus for moulding plastic sheet |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |